A Sloon is a person who is undesirable, actions seem to be underhanded or "shady" , usually accompanied with the word ass. Ie. Sloon ass, or sloony ass. The array of people who can be called a sloon is large, pretty much any action not widely accepted by the group or person judging you can merrit the label SLOON. (southern cali)

Bro, that sloon ass nigga really still talking shit about me on facebook, ima fuck him up when i see him with his sloony ass